1241231865645 has 8 divisors (see below), whose sum is σ = 1985970985056. Its totient is φ = 661990328336.

The previous prime is 1241231865589. The next prime is 1241231865661. The reversal of 1241231865645 is 5465681321421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1241231865645 - 2²⁰ = 1241230817069 is a prime.

It is a super-3 number, since 3×1241231865645³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1241231865594 and 1241231865603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41374395507 + ... + 41374395536.

It is an arithmetic number, because the mean of its divisors is an integer number (248246373132).

Almost surely, 2^{1241231865645} is an apocalyptic number.

1241231865645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1241231865645 is a deficient number, since it is larger than the sum of its proper divisors (744739119411).

1241231865645 is an equidigital number, since it uses as much as digits as its factorization.

1241231865645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82748791051.

The product of its digits is 1382400, while the sum is 48.

The spelling of 1241231865645 in words is "one trillion, two hundred forty-one billion, two hundred thirty-one million, eight hundred sixty-five thousand, six hundred forty-five".